Bolu climate by month
Averages and records for each calendar month at Bolu, Türkiye, from 1973 to 2026. The warmest month is August, averaging 28.5°C; the coolest is January at 5.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 5.9°C | −2.1°C | 19.8°C19 January 1987 | −22.0°C24 January 1974 | 37 / 46 |
| February | 8.0°C | −0.9°C | 21.4°C29 February 2024 | −22.0°C23 February 1985 | 26 / 45 |
| March | 11.4°C | −0.4°C | 27.6°C26 March 2001 | −17.8°C2 March 1985 | 38 / 45 |
| April | 17.1°C | 4.1°C | 31.8°C12 April 1998 | −10.0°C11 April 1997 | 39 / 45 |
| May | 21.6°C | 7.7°C | 33.0°C20 May 2015 | −5.1°C2 May 1985 | 37 / 45 |
| June | 25.2°C | 11.4°C | 37.0°C27 June 1996 | 0.7°C9 June 1987 | 36 / 45 |
| July | 27.8°C | 13.5°C | 39.3°C13 July 2000 | 3.2°C26 July 1995 | 41 / 46 |
| August | 28.5°C | 13.9°C | 42.8°C15 August 2023 | 4.8°C1 August 1982 | 39 / 46 |
| September | 24.9°C | 10.3°C | 38.5°C3 September 2020 | 0.6°C28 September 1992 | 36 / 46 |
| October | 19.3°C | 6.7°C | 34.4°C1 October 2012 | −6.0°C30 October 1973 | 41 / 45 |
| November | 13.6°C | 2.2°C | 26.9°C4 November 2023 | −15.0°C6 November 1973 | 35 / 45 |
| December | 7.7°C | −0.6°C | 23.5°C4 December 2010 | −22.6°C31 December 1992 | 38 / 45 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 26 to 41 years each.
See what Bolu is doing right now
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.